<template>
	<el-skeleton animated :loading="loading">
		<template #template>
			<el-card>
				<el-skeleton-item variant="h3" style="width: 50%" />
				<div class="margin-top">
					<el-skeleton-item variant="text" />
					<el-skeleton-item variant="text" class="margin-top" />
					<el-skeleton-item variant="text" class="margin-top" />
					<el-skeleton-item variant="text" class="margin-top" />
				</div>
			</el-card>
		</template>
		<template #default>
			<el-card class="flex-sub chart-item-container" :body-style="{ padding: 0 }" shadow="never">
				<template #header>
					<div class="text-bold">一周销售额（单位：万）</div>
				</template>
				<div ref="salesChart" class="chart-item"></div>
			</el-card>
		</template>
	</el-skeleton>
</template>

<script lang="ts">
import { dispose, graphic } from 'echarts'
import useEcharts from '@/hooks/Echarts'
import { defineComponent, nextTick, onBeforeUnmount, onMounted, ref } from 'vue'
export default defineComponent({
	name: 'SalesChart',
	setup() {
		const loading = ref(true)
		const salesChart = ref<HTMLDivElement | null>(null)
		const init = () => {
			const option = {
				grid: {
					left: '2%',
					right: '5%',
					top: '5%',
					bottom: '3%',
					containLabel: true
				},
				tooltip: {
					trigger: 'axis'
				},
				xAxis: {
					type: 'category',
					data: ['周一', '周二', '周三', '周四', '周五', '周六', '周天'],
					boundaryGap: false,
					splitLine: { show: false }
				},
				yAxis: {
					type: 'value',
					boundaryGap: false,
					splitLine: { show: false }
				},
				series: [
					{
						data: [150, 180, 224, 218, 200, 180, 150],
						type: 'line',
						smooth: true,
						showSymbol: false,
						lineStyle: {
							width: 0
						},
						areaStyle: {
							opacity: 0.8,
							color: new graphic.LinearGradient(0, 0, 0, 1, [
								{
									offset: 0,
									color: 'rgba(55, 162, 255)'
								},
								{
									offset: 1,
									color: 'rgba(116, 21, 219)'
								}
							])
						}
					}
				]
			}
			setTimeout(() => {
				loading.value = false
				nextTick(() => {
					useEcharts(salesChart.value as HTMLDivElement).setOption(option)
				})
			}, 100)
		}
		const updateChart = () => {
			useEcharts(salesChart.value as HTMLDivElement).resize()
		}
		onMounted(init)
		return {
			loading,
			salesChart,
			updateChart
		}
	}
})
</script>

<style lang="scss" scoped>
.chart-item-container {
	width: 100%;
	height: 215px;
	.chart-item {
		height: 180px;
	}
}
</style>
